0
Q:

# A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water rises in the tube. The height of water rise in the tube can be increased by

 A) decreasing the radius of the capillary tube B) increasing the radius of the capillary tube C) increasing the height of water in the vessel D) None of these

Explanation:

The water rise in a capillary tube dipped in water is such that the weight of water in the tube above the surface of water in the vessel is equal to  the upward force due to surface tension. So it is clear that if the bore to the tube is decreased , the height of the water column in it  must be greater.

Subject: Physics
Q:

Lightning heats the surrounding air to

 A) 300 deg Cent B) 3000 deg Cent C) 30000 deg Cent D) 300000 deg Cent

Explanation:

Lightning is extremely hot — a flash can heat the air around it to temperatures five times hotter than the sun’s surface. This heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash.

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0 29
Q:

Which is an example of Phototropism?

 A) roots of a plant following water B) plant bending toward the light C) roots growing into the soil D) a venus flytrap capturing a fly

Explanation:

Phototropism is the ability of a photosynthesizing organism, to grow directionally in response to a light source. It is very common in plants, but can also occur in other organisms such as fungi.

Example :: Sunflower

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0 4
Q:

Which liquid is the most viscous?

 A) Water B) Diesel C) Milk D) Oil

Explanation:

Here Oil is the most viscous liquid.

The liquid with the most intermolecular force is high viscous. viscosity is how smoothly a liquid flows and how hardly the liquid flows it is highly viscous.

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1 16
Q:

Nuclear Fission is caused by the impact of

 A) Electron B) Neutron C) Proton D) Deutron

Explanation:

In nuclear physics, nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei). The fission process often produces free neutrons and releases a very large amount of energy.

Thus, The Nuclear Fission is caused by the impact of Neutrons.

1 9
Q:

Which of the following uses a Non Renewable Energy Source?

 A) Wind Mill Power Plant B) Hydro Electric Plant C) Nuclear Power Plant D) Tidal Power Plant

Explanation:

Nuclear Power Plant uses a Non Renewable Energy Source.

Non-renewable energy is that source of energy which can not be used again and again. This sort of energy is sustainable to exhaustion.

Non renewable energy is that form of energy which is subject to deletion. This type of energy is of many uses to us. It can be used to produce electricity, heating, cooking, transportation and manufacturing. 85% of the energy used in the industrial processes is form the non-renewable type of energy.

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2 13
Q:

Which Color has the Longest Wavelength?

 A) Violet B) Yellow C) Red D) White

Explanation:

The visible colors from Longest wavelength to Shortest wavelength are :: Red, Orange, Yellow, Green, Blue and Violet.

Red > Orange > Yellow > Green > Blue > Violet.

1. Infrared radiation has a longer wavelength than visible Red light.

2. Ultraviolet radiation has a shorter wavelength than the visible violet light.

3. The white light is a mixture of the colors of the visible spectrum.

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3 100
Q:

Which of the following is Not a form of Energy?

 A) Heat B) Sound C) Motion D) Pressure

Explanation:

Pressure is Not a form of Energy.

Energy : It is defined as the ability to do work.

Energy comes in two basic forms. They are :

1. Potential Energy

2. Kinetic Energy

Potential Energy is any type of stored energy. It can be chemical, nuclear, gravitational, or mechanical.

Kinetic Energy is found in movement. An airplane flying or a meteor plummeting each have kinetic energy. Even the tiniest things have kinetic energy, like atoms vibrating when they are hot or when they transmit sound waves. Electricity is the kinetic energy of flowing electrons between atoms.

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3 85
Q:

How long would it take to travel 4 light years?